Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
May 20, 1862. "The Peninsula, Virginia. The staff of Gen. Fitz-John Porter; Lts. William G. Jones and George A. Custer reclining." Photographs from the main Eastern theater of war: the Peninsular Campaign, May-August 1862. Wet plate glass negative, half of stereograph pair, by James F. Gibson. View full size.